So when Sirius escapes Azkaban, the wizard's prison, the Azkaban guards are sent to capture him. The Azkaban guards are dangerous and disturbing magical creatures known as dementors. A dementor ...

The most notable change was the removal of Dementors as the guards, finally disposing of the colony and allowing a rotating series of Aurors to act as the wardens of Azkaban. The change was ...

has escaped from Azkaban Prison and wants to kill Harry to avenge the Dark Lord. To worsen the conditions for Harry, vile creatures called Dementors are appointed to guard the school gates and ...